You're moving the goalposts; the purpose would be reducing toil (and possibly other costs) for the people who are currently tasked with filling out these types of forms.

There's nothing in the comment you're responding to that suggests that it's instead meant to be a solution to the problem of the government (or any other org) being unable to trust the inputs to its systems or ameliorate the costs of bad actors at all.

A person entering lies in their personal fact database tomorrow can submit the same lies on their personal income tax return today.